Fluidplay

Anybody seen these before? kinda interesting...what are your thoughts? www.trinetmotorsports.com

RKD in OKC

Read the stuff on their new technology thing and this was my first thoughts.

This is not new technology.

Cross drilling helps to evacuate water. It is not intended to cool rotors. Also you must inspect holey rotors often as the holes tend to cause stress fractures near the holes that can cause a rotor to break instead of brake. The best thing to prevent warping ducting more air to the brakes to keep them from getting too hot in the first place. The second best is cryotempering the rotors.

Slots help to remove the gases and dust created to maintain the grip, it does not "Improve Grip."

turbo8

having iron crosses on your brake rotors= awsome

2bridges

Cross drilled rotors are a mixed bag. Additional cooling is at the sacrifice of rotor surface in contact with pad. I think 99% like the look. I especially would be leary of the heavily drilled rotors as pictured. Cracking between drilled holes is common.

slotted rotors are for maintaining fresh pad material. By design you will wear pads at a much faster rate in sacrifice of ultimate pad surface for peak braking. That said, this is silly for anything but a true track car. Again many consumers are going for the look.

Van

Really, really sad...

My understanding is that cross drilled/slotted/etc provides an escape route for the gasses (burring pad binder) that exist between the pad and the rotor. This is the primary cause of brake fade -- this compressible cushion prevents solid contact between the pad and the rotor.

The cooling is really handled by the internal fins -- and in the case of the turbo S, the more efficient curved internal fins (that's why there is a left and a right). As the rotor spins, it sucks air in from the back center and expels the air around the circumference. I imagine there is very little cross air flow through the cross drilled holes...

Chris White

The original idea behind drilling the rotors was to make them lighter….
And then the marketing guys and bench racers made up the rest!

A big difference on methodology is drilling vs casting. The Porsche rotors are cast hole rotors – much less prone to cracking (they will - but much later)

Acetylene

Van is indeed dead on the money. I have cross drilled rotors at all four corners and they perform flawlessly. I have only seen cracking problems on heavily abused (big-time track) cars and I have not seen it very often.

On that note, mine are for the looks more than the performance, as the factory rotors are more than adequate.

billindenver

I've never seen a set of tracked cross drills that were not showing signs of cracking. On the track, brakes get a serious workout. I've also seen a rotor let go due to cracking and I never want to see that again. I wouldn't put cross drilled on my car if you gave them to me, but then my car is mostly track. Mine are slotted and I have never found myself wanting more braking.

2bridges

I have seen about 10 cracked rotors from various manufacurers domestic and foreign. None were track used, and all were "name bbrand" quality rotors. Mustangs, imports, etc,etc. Only commonality cross drilled and cracked. The notion that cracking is due to excessive track use in not true. All these were street cars, only two had ever even seen a track.

I will not run drilled rotors. Slotted for a track car, but never drilled for me

Cory9584

I thought the idea was also to give the dust somewhere to go